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A construction method for overall hoisting of long-span steel truss girders

A construction method and overall hoisting technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of crisis ship shipping safety, large safety hazards of brackets, high construction investment costs, etc., to reduce construction costs and shorten construction The effect of simple construction period and simple operation

Active Publication Date: 2015-11-18
CHINA RAILWAY ENGINEERING CORPORATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the requirements of the maritime department, if supports are installed in the channel, the net span shall not be less than 45m, and the navigation height limit shall not be less than 7m. The safety hazard of the support itself is very large. The float-over method is used for construction, the construction process is complicated, the construction investment cost is large, and the safety risk is high.

Method used

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  • A construction method for overall hoisting of long-span steel truss girders
  • A construction method for overall hoisting of long-span steel truss girders
  • A construction method for overall hoisting of long-span steel truss girders

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Embodiment Construction

[0030] Jinli River Bridge 1 is a newly built bridge at the Jintan section of the Danjin Licao River Changzhou jurisdiction because the waterway of the Danjin Licao River has been renovated from five levels to three levels. The new bridge is located 14m downstream of the old bridge. It is an under-supported steel truss girder with a main span of 81.96m. The span ratio is 1 / 7.36. The distance between the centers of the two main trusses is 13.2m, the width-span ratio is 1 / 6.14, and the bridge deck width is 12.0m. The steel truss girder 2 weighs more than 600 tons.

[0031] The overall hoisting construction method of long-span steel truss girders includes the following steps:

[0032] (1) Selection of lifting points: According to the existing floating crane equipment, two floating cranes of 500 tons and 300 tons are used for hoisting; according to the lifting performance of the two floating cranes, the location of the steel beam lifting point is reasonably selected. Set up asym...

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Abstract

The invention discloses a construction method for integral hoisting of a large-span steel trussed beam. The construction method includes the following steps: (1), selecting a suspension center for integral hoisting of the large-span steel trussed beam, (2), designing and constructing a hoisting tool, and (3), constructing for integral hoisting. The construction method has the advantages that the steel trussed beam is erected through integral hoisting under a navigation condition, and the construction method is simpler in operation and easier in accuracy control as compared with a method in which the steel trussed beam is constructed through less-support segmentation assembly and floating support; safety risk of operations at sea is reduced, construction period is shortened, and construction cost is reduced.

Description

technical field [0001] The invention relates to the field of bridge manufacturing, in particular to a construction method for overall hoisting of large-span steel truss girders. Background technique [0002] At present, the overall hoisting construction of steel truss girders is a newly developed bridge construction method. Because it has little impact on the normal navigation of the channel, the high-altitude operation is changed to ground operation, the construction is fast, and the technical and economic benefits are high. There are great application advantages and application prospects in regional construction. A breakthrough in this field means standing on a new commanding height, and its economic value and application prospects are very good. [0003] There are many thousand-ton ships and trailer fleets passing by many rivers in our country, and they must not stop sailing during bridge construction. According to the requirements of the maritime department, if support...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
Inventor 侯宇飞钱有伟欧阳石赵飞陈辉吴曙光汤彬伟谢志华房玉环万欢欢
Owner CHINA RAILWAY ENGINEERING CORPORATION